Typewriting machine



June 12, 1928. 1,673,687

A. G. F. KUROWSKE TYPEWRITING MACHINE Filed March 15, 1924 l J;Z H. JH.-qW j 4/ a! Ia I 4/ LmLmLrLnJuLn rLnimJm Affar/rey/ Patented June 12,1928.

UNITED STATES PATENT OFFICE. V

ALFRED G. F. KUROWSKI. OF BROOKLYN, NEW YORK, ASSIGNOR '10 UNDEBWOODELLIOTT FISHER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

TYPEWRITING MACHINE.

Application filed larch 15, 1924. Serial No. 699,420.

This invention is an improvement in typewriting machines, and an objectof the invention is to provide, in typewriting machines having typingsystems tilted back,

6 for compactness, connections between the main frame and thecarriage-shift-frame, such as will guide the carriage to shift obliquelyparallel with the plane of the typefaces in printing position.

Another object is to provide connections of the character abovementioned, such that the shift-frame may be adjusted with respect to themain frame to bring the platen printing line into the printing plane ofthe type-faces and maintained in such position.

Another feature is to provide bearings between the carriage and theshift-frame having positive rolling connections between the carriage andshift-frame to prevent an the bearings from becoming displaced withrespect to the carriage movement.

Another feature is to provide an arrangement of bearin s between thecarriage and shift-frame suc as will provide a proper rolling engagementwithin the longitudinal line-printing zone of the carriage, and arran edto be released by the carriage and shi t-frame when the carriage is atthe extreme of its travel in one direction.

Another object is to provide a truck having a pair of anti-frictionrolls at each end thereo to cooperate with a pair of carriagerails, andeach truck provided with a center gear to engage rack-teeth in bothrails, the ratio of radial movement between the gear and theanti-friction rolls being such that the longitudinal travel of saidtruck and rolls will be only one-half the longitudinal movement of thecarria Other features and adiantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is an end elevation of the carriage, with parts of theshift-frame and main frame broken away.

Figure 2 is a plan view of the stationary shilft rails with parts insection.

tical section of the races.

Figure 4 is a rear elevation of the main frame side plate at the left.

Figure 5 IS a sectional view of Figure 4.

Figure 6 is a side view of the truck, with parts in section.

5 Figure 7 is an end view of Figure 6.

gure 3 is an enlarged transverse ver-- Figure 8 is a section on the lineX of Figure 6.

The present embodiment of the invention is shown in connection with atypewriting machine of the character forming the subject-matter of myco-pending application, No. 697,476, filed March 7, 1924, wherein isshown and described a typewriting machine having a typing s stem tiltedrearwardly, so that the type-hars are inclined rearwardly in printingposition, and the printing plane of the type-faces is correspondinglyinclined.

The machine includes a main frame having side plates 10, each of whichis provided with an inwardly-extending lug 11, and a type-segment 12 issecured to the lugs. Referring to Figures 1 and 2, it will be seen thatthe plane of the lugs inclines rearwardly toward its top, and thesegment is inclined in the same manner. The carria e-shiftframe includesend plates 13 suitahly connected, and each plate is supported by a pairof links or arms 14 and 15, the links pivoted at one end to the mainframe, and at the other end to the shift-frame. Each pair of links isabout parallel, the pivotal connection with the main frame being at therear ends of the links. The arrangement is such that when theshift-frame is lifted it is constrained to move rearwardl the componentof the two forces shifting t e frame parallel with the angular printingplane of the typefaces.

To adjust the ends of the platen independently of each other eitherforwardly or backwardly, to secure evenness of type impressionsthroughout the line of typing, each of the links 14 and 15 is soconnected that the same may be bodily shifted endwise (together with thecontiguous portion of the shift-frame) independently of all the otherlinks. For this purpose, one end of each link is mounted upon aneccentric pivot, which is turnable to change the eccentricity thereof.In the present instance, the eccentric pivots connect the links with themain frame. As shown more particularly in Figure 5, the link 14 isconnected to the main frame by a pivot 17 having an annular groove 19intermediate its ends engaged by a set-screw 18, threaded through themain frame. Said screw prevents longitudinal movement of the pivot whilepermitting rotation thereof, and it is turned by means Ill of ahexagonal head 21, the link 14 being mounted on an eccentric portion 20of the pivot, which is between the head 21 and the a body 17 of thepivot. The pivot 26 which connects the link 15 with the main frame isjournaled in an opening in the main frame, and said pivot has an annulargroove 28 engaged by a set-screw 27 to rotatably connect the same withthe main frame. The pivot has an eccentric portion 25 which is receivedin-an opening 24 in a rod or bar 23 connecting the links 15 at theopposite sides of the frame. The link 15 is journaled on a reducedportion of the rod or bar between the same and the adjacent side plate10. When either pivot 17 or 26 is turned, the eccentric portion thereofis shifted angnlarly, and the position of the adjacent link is changed,thus to move the adjacent portion of the shifting frame toward or fromthe typing system. -The ends of the shift-frame may be simultaneouslymoved, or independently, as may be desired. Thus the frame may beadjusted angularly, and it may be tilted forwardly or rearwardly bymaking the necessary adjustment of the links 15, or of the links 14.

Each of the end plates .13 of the carriageshift-frame has at its endsinwardly-extending ears or lugs 29 and 33, and rails 31, 32 in the formof channel members, are secured to the ears. Each of the rails is rightangular in cross-section, and the rail 31 at the rear of the frame isadjustably connected with the ears by means of screws 30 which engageelongated slots in the rail. The forward rail 32 is riveted to the cars33, and the carriage 34 has similarly shaped rails 34 which co-operatewith the rails 31 and 32 to formraces. The rails 34 are formed bybending up the front and rear edges'of the base plate of the carriage,as shown, and each rail 34 has a bearing surface parallel with'andspaced apart from a bearing surface of theadjaeent fixed rail 31 or 32,as the case may be. A bearing truck is arranged between each pair ofco-operating rails. The truck, which is a hollow body formed ofsheet-metal, or the like, has journaled thereon a plurality of pairs offriction rollers 35, a pair being arranged at each end of each truck.Each of the rollers 35 is journaled in the truck, and the walls thereofare cut away, so that the peri hery of each roller extends beyond thewal s of the truck. The members of each pair of rollers have their axes38 and 39 at right angles, as shown in Figures 6 and 7, and the rollersat one end of the truck are symmetrical with those at the other end.

- Referrin to Figures 1 and 3, it will be seen that e rails 34 arebetween rails 31 and 32, the arrangement being such that when the trucksare in place'the carri e is locked in rolling engagement with the'ftframe, that is, the carriage may move freely longitudinally, but itcannot lift away from the shift-frame. The carriage is, however, easilyreleased from the shift-frame by detaching the rail 31, which may bedone by releasing the screws 30. Since the screws engage slots in therail 31, said rail may be adjusted toward and from the rail 32 toprovide the proper engagement between the rollers of the trucks and therails. It will be seen, by referring to Figure 3, that each rail has asurface for engagement by each roller of a pair.

Mechanism is provided whereby each bearing truck may travel differentlywith the carriage. Said mechanism includes a toothed wheel 40 which isjournaled, as indicated at 41, in an opening extending transversely ofthe truck, between the pairs of rollers. The plane of the toothed wheelis diagonal to the truck body, and the walls of the body are cut away,so that the wheel extends beyond both sides thereof. The lower edges ofbothrails 31 and 32 are provided with teeth, indicated at 42, and thefree ends of the rails 34 have similar teeth indicated at 43. The series42 and 43 of teeth at each side of the carriage-frame are directly 0posite, and both series are engaged by he teeth of the wheel 40 of theadjacent truck.

This arrangement prevents the possibility of the truck creeping out ofproper relation with respect to the carriage-movement, when the carriageis violentlythrown to the right hand.

Referring to Figure 2, it will be seen that the teeth 42 are at thecenter of the rails, extending for a distance on each side of thecenter, the series occupying about one-third of the length of the rail.At the right-' hand end, each rail is cut away to the depth of theteeth. This provides an easy method for removing the trucks. When thecarriage is forced to the right, to the extreme of its movement in thatdirection, the toothed member 40 is just out of engagement with bothseries of teeth 42. By means of a rod or key pushed into raceways fromthe left of the machine, the trucks may be pushed out at the right-handend, thus releasing the carriage from the shift-frame. It may also bereleased by detaching the rail 31. The arrangement provides for a readyinterchange of carriages and platens, and for easy access to thecarriage-feeding mechanism, ribbon-vibrating mechanism. and other partswhich are directly beneath the carriage.

The adjustable connection between the main frame and the carriageshift-frame permits an exact positioning of the carriage with respectthe segment, so that the platen printmg line may be brought intocoincidence with the printing plane of the t e-faces, and without thenecessity for any 0 ange in the position of the segment.

By means of the adjustable rail 31 any tightness or looseness of thebearings between the carriage and the shift-frame may be eliminated.When the rail is detached, the carriage may be removed as a unit. Thismay also be accomplished by first removing the trucks, asabovedescribed, after which the carriage may be lifted bodily from theshift-frame.

Variationsmay be restored to Within the scope of the invention, andportions of the improvements may be used without others.

Having thus described my invention, I claim:

1. In a typewritingmachine, the combination of a pair ofcarriage-raceways provided with teeth out through the diametric oppositeedges thereof, an anti-friction hearing within the .raceways, includinga tubular truck formed into a square cross-section from a single pieceof sheet-metal and having formations at each end thereof to pivotallysupport and house -a pair of antifriction rolls to engage the raceways,and a truck-timing gear pivoted to the truck to jointly engage with therack-teeth in both raceways.

2. In a typewriter-carriage and track mechanism having a grooved rail onthe carriage and a-- grooved guide-track opposed to the rail andco-operat ing therewith to form.

a raceway, antifriction bearing members rolling in said raceway, and atruck within said raceway connecting said bearing members, thecombination of a pinion on said truck and extending through said racewaybetween said grooved rail and said grooved track,'and racks meshing withsaid pinion on its opposite sides, said racks being upon the rail andtrack respectively.

3. In a typewriting machine having a carriage-frame with groovedrail-portions on its front and rear edges, and having grooved tracksopposed to the grooves in the carriage-rails and forming therewith frontand rear raceways, and also having antifriction bearin members rollingin the raceways, the combination of trucks within said raceways, eachtruck connecting the bearing members in its raceway, pinions on saidtrucks, each pinion extendin through its raceway between the groovecarria e-rail and the grooved track, and a pair 0 racks for" eachraceway, the racks in each pair meshing with their pinion on itsopposite sides and being upon the track and rail respectively.

4. In a typewriter-carriage and track mechanism having a grooved rail onthe carriage and a grooved guide-track opposed to g .the rail andco-operating therewith to .form

rail and track being channel-bars struck upfrom sheet metal, with edgesat diametrically opposite portions of the raceway, and said racks beingformed in said edges.

5. In a typewriter-carriage and track mechanism having a grooved rail onthe car-' 'riage and a grooved guide-track opposed to the rail andco-operating therewith to form a raceway, antifriction bearing membersrolling in said raceway, and a truck within said raceway connecting saidbearing members, the combination of a pinion on said truck and extendingthrough said raceway between said grooved rail and said grooved track,and racks meshing with said inion on its opposite sides, said racksbeing upon the rail and track respectively, the pinion-teeth and therack-teeth pointing outwardly from the race, the pinion being inclinedinto the racks, and the rail and rack being sufiiciently separated toform a clearance for the pinion.

6. In a typewriting machine having a carriage provided with a groovedrail opposed to a stationary grooved carriage-guiding track to form asingle raceway, the combination with a tubular truck within saidraceway, of bearing rollers mounted upon each end of the truck at rightangles to each other, a pinion upon said truck, and gears upon the railand track meshing with the pinion, said pinion protruding from oppositesides of the truck and extending out between the rail and the track.

7 .In a typewriting machine having a carriage provided with a groovedrail opposed to a stationary grooved carriage-guiding track to form asingle raceway, the combination with a tubulartruck within said raceway,of bearing rollers mounted upon each end of the truck at right angles toeach other, a pinion upon said truck, and gears upon the rail and trackmeshing with the pinion, said pinion protruding from opposite sides ofthe truck and extending out between the rail and the track, the truckhav- 1n openings through which the pinion and afithe rollers protrude,the truck being in the form of a tube.

ALFRED G. F. KUROWSKI.

